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Wed, 03 Apr 2024 16:51:02 -0700 (PDT) Date: Wed, 03 Apr 2024 16:51:02 -0700 In-Reply-To: <00000000000098f75506153551a1@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000002f2066061539e54b@google.com> Subject: Re: [syzbot] [kernfs?] possible deadlock in kernfs_fop_llseek From: syzbot To: gregkh@linuxfoundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tj@kernel.org, valesini@yandex-team.ru Content-Type: text/plain; charset="UTF-8" syzbot has bisected this issue to: commit 0fedefd4c4e33dd24f726b13b5d7c143e2b483be Author: Valentine Sinitsyn Date: Mon Sep 25 08:40:12 2023 +0000 kernfs: sysfs: support custom llseek method for sysfs entries bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17cb5e03180000 start commit: fe46a7dd189e Merge tag 'sound-6.9-rc1' of git://git.kernel.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=142b5e03180000 console output: https://syzkaller.appspot.com/x/log.txt?x=102b5e03180000 kernel config: https://syzkaller.appspot.com/x/.config?x=4d90a36f0cab495a dashboard link: https://syzkaller.appspot.com/bug?extid=9a5b0ced8b1bfb238b56 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17f1d93d180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15c38139180000 Reported-by: syzbot+9a5b0ced8b1bfb238b56@syzkaller.appspotmail.com Fixes: 0fedefd4c4e3 ("kernfs: sysfs: support custom llseek method for sysfs entries") For information about bisection process see: https://goo.gl/tpsmEJ#bisection